Forestry has three main aspects to take into consideration today; economical, ecological and socio-cultural. In order to reach the broad policy goals for sustainable forest management, an increased variety of management approaches are requested. Today clear-cutting is the only method used in 96 % of the managed forests in Sweden. The Swedish National Board of Forestry has therefore initiated a project in order to investigate and develop Continuous Cover Forestry (CFF). This study is a part of this project.

Funderingar kring användningsfall? Denna uppsats belyser användningsfallsmodellering, en enkel, effektiv och vida spridd metod, dock förenad med vissa svårigheter. En fallstudie är genomförd på två företag för att illustrera hur användningsfall utformas och om det finns någon utformning som kan ge mervärde för utvecklingsprocessen. Ett mervärde vi funnit är att använda beskrivningssätt som alla förstår. Uppsatsen belyser även svårigheter relaterade till framtagningen, varför dessa uppstår och hur de kan undvikas.

Vid objektorienterad systemutveckling är det viktigt att man genomför en analys- och designfas, dels för att man inom ett utvecklingsteam lättare ska kunna visualisera hur ett system är tänkt att bli och dels för att kunna fånga och åskådliggöra kundens krav. Till sin hjälp i dessa faser har man metoder/processer och modelleringsspråk. Varje företag har i regel haft sin egen variant av ovan nämnda, men allteftersom kom kravet på en gemensam standard att bli oundvikligt. Sedan ett antal år tillbaka finns nu en standard. Trots det finns det säkert företag kvar som ännu inte antagit denna standard.

To curb greenhouse gases and mitigate climate change is one of the biggest challenges human society face today. Carbon dioxide (CO2) has accumulated rapidly in the atmosphere as a consequence of burning of fossil fuels and deforestation. The aim of this study is to explore two methods to store carbon dioxide in geological formations and biological sinks. The aim is also to discuss the two mitigation options from a sustainable perspective and whether it can lead to a better environment and benefits for local and global societies. The research questions are: Which method to store carbon dioxide, geological or biological, is the most effective? Which method to store carbon dioxide, geological or biological, has the greatest potential to promote sustainable development for local communities?The method used is a comparative case study and presents four case studies that explore the potential for CO2 storage offshore in Norway and Brazil; and in tropical forests in Mexico and Brazil.

The most predominant method for forest harvesting in Sweden is the cut-to-length method based on two-machines, a harvester that fells trees and cut them in a predefined length, and a forwarder which transports logs to a landing area for further transport to a processing facility. New machine solutions have to be much gentler to the ground than today?s machines. To be able to develop a forestry machine that preserves the terrain requires a proper understanding of the interaction between tire and soil.The goal of the project is to contribute to the existing knowledge of forest machine tire-soil interaction and to develop a tire-soil model that enables dynamic simulations of forest machines operating in rough terrain. The modeling has especially been focused on the interaction between tires and soft ground.A comparison of theoretical data of different WES-based terrain interaction models and a comparison test data from a full scale field test is presented.

AbstractBuilding Information Model/Modeling/Management (BIM) is a tool that allows for efficient working methods. BIM saves time and money while providing the potential for visualization. This method of working is based on a 3D-model, and then a fourth and fifth dimension are connected. 5D modeling means that a spreadsheet creates cost estimates based on the 3D model. This provides opportunities to carry out calculations in the early stages of the projects. Calculations are currently performed manually and do not contribute to the development that the construction industry requires.

How can a vacuum cleaner motivate you to use it? From a sustainability perspective,the author asked the question of how such a solution would looklike? These where issues that the project tackled and devised solutions for. Theproject wanted to explore the physical modeling and a large part of the finalresult consisted of a full scale model. The project found that the problem ofvacuuming largely consisted of the problem of storage the product. The projectfound that the motivation for the job, therefore, could be resolved by a betterdesigned vacuum cleaner with a built-in hose, folding handles, which couldbe stored integrated within the vacuum cleaner.

The purpose with this masters thesis was to model the scanner in a system for laser bathymetry. The model was then used to develop a controller for the scanner so a good search pattern was achieved. Two different types of models have been tested, a physical model and a Black Box model of Box Jenkins type. The physical model has been derived from Lagranges equations. Identification experiments have been used to compute the Black Box model and to find the unknown parameters in the physical model.

The goal of this master thesis project was to develop computer models of some plausiblepretreatment techniques and to assess the potential benefits/costs of using pretreatment andanaerobic digestion for waste management of organic waste from a system perspective. Forthis purpose a computer program called ORWARE has been used. ORWARE (organic wasteresearch) is a program for making life cycle assessments of waste management. As the mainpart of the project work the ORWARE system has been provided with three new models ofpretreatment techniques. The additions consist of: One model of pretreatment with ultrasound,one model of thermal hydrolysis and one model of a screw press.

Då möjligheten till åtkomst till Internet har ökat mycket de senaste åren med hjälp av 3G och andra lösningar har användare blivit mer och mer mobila och kan utföra stora delar av sitt arbete från hemmet eller under resor. Detta har satt tryck på marknaden att leverera lösningar som kan möjliggöra detta på ett säkert och användarvänligt sätt. Men även att göra det möjligt att leverera skräddarsydda lösningar för användarnas behov. För att det ska vara möjligt att leverera en passande lösning behöver man veta vad företaget har för behov, vad som finns implementerat i dagsläget och vad för tjänster som nyttjas av användarna. För att få reda på denna information behöver en analys av det befintliga systemet genomföras.

When the purpose is to create an illustration plan for a new neighbourhood there arelots of things to think about. In this report follows a description of the three differentplan modells SCAFT/TRÅD, garden city and ekological planning. SCAFT is aplanning model that were used in the 1970s. It contains proposals how to make thetraffic enviorment safer. TRÅD replaced SCAFT in 1982 and it contains also adviceshow to make the traffic enviorment safer.

Understensho?jden is Stockholm's largest eco-village which was built in the early 1990s with the vision of enabling ecological living for people. However the ecovillage is no longer considered as environmentally friendly because of its relatively high energy consumption, and non-updated energy system. The purpose of this study is therefore to investigate how Understensho?jden should reduce their energy consumption and upgrade its energy system by using Blower-Door, IR-camera and Design Builder.

Authorities, municipalities and county councils have great opportunities to pave the way to a sustainable society. In the public sector, the tax revenue is used and therefore it is important that both employees and societal stakeholders feel that they participate in the sector?s decisions and fields of application. Municipalities and county councils are primarily service organisations. The employees? commitment is necessary to be able to reach set goals, to develop procedures and policies that support the overall political goals, in other words, to be successful in the environmental work.

This master?s thesis describes the development of a model of the catalystsystem aiming at control by an MPC. A well functioning model, which is suitable in control purpose, is important while emission legislation become more and more hard to fulfill for the car manufacturers. Much research has been done in the field of physical modeling of the system, but in this work a linear adaptive time discrete ARX-model is developed and validated.The systems tendency to change its dynamic during usage implies that the model must be adaptive. The developed model proved to be well functioning and shows promising conditions for the MPC design.

In this paper discourse analysis on the Ethiopian National Action Program (NAP) to combat desertification is made. The aim is to describe how the overall image/picture of desertification, its causes, and effects and of possible solutions are presented in the NAP. The result of this analysis shows that the main cause of desertification is human activities mainly due to the poorly developed socio-economic situation in the dryland areas. It is indicated that an excessive dependency of the rural population on the natural resources, particularly land, is the major cause of land degradation and this deterioration of land is said to have been caused by the rapid population growth, overgrazing, forest clearing as well as past government and institutional failures. In addition it is indicated that the effect of desertification usually involves ecological changes that sap land of its ability to sustain agriculture and human habitation, therefore the most serious threat to human welfare.